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Q108-0000
ACTIONI/Q
®
Q108
DC Powered DC Input Limit Alarm
Provides Relay Contact Closures
at a Preset DC Input Level
Field Configurable Input Ranges
TouchCAL
TM
Technology
Setpoints Programmable HI or LO and Failsafe or
Non-Failsafe
High Density DIN Rail Mounting
Description
The ActionI/Q model Q108 is a DIN rail mount, DC voltage or
current input limit alarm with dual setpoints and two contact
closure outputs. The field configurable input and alarm functions
offer flexible setpoint capability. Input voltage spans from 10mV
to 200V and input current spans from 1mA to 100mA can be field
configured. Bipolar inputs are also accepted.
The Q108 is configurable as a single or dual setpoint alarm, with
HI or LO trips and failsafe or non-failsafe operation. Also included
are adjustable deadbands (up to 100% of full scale input) for each
setpoint, a 24VDC voltage source (isolated from line power) for
transducer excitation, and a universal DC power supply which
accepts any voltage between 9 and 30VDC.
TouchCAL Technology
Action has simplified setpoint calibration. Using a pushbutton
instead of potentiometers, improvements in calibration resolution and reliability are realized due to the elimination of the
potentiometers’ mechanical variability.
For calibration, simply input the signal level of the desired trip and
press the pushbutton to store it in non-volatile memory.
Deadband is entered the same way with another pushbutton press
to store.
Flexible 9 to 30VDC Power Supply
24VDC Transducer Excitation
SnapLoc
TM
Plug-in Terminals
ASIC Technology
Operation
The Q108 limit alarm setpoints can be configured for HI or LO,
failsafe or non-failsafe operation. Each of the setpoints has a
respective HI or LO deadband. In a tripped condition, the setpoint
is exceeded and the appropriate red LED will illuminate. The trip
will reset only after the process falls below the HI deadband or
rises above the low deadband (see Figure 1). For proper deadband
operation, the HI setpoint must be set above the LO setpoint. In
failsafe operation, the relay is energized when the process is below
the HI setpoint or above the LO setpoint (opposite for nonfailsafe). In the failsafe mode, a power failure results in an alarm
state output.
Dynamic Deadband
Circuitry in the Q108 prevents false trips by repeatedly sampling
the input. The input must be beyond the setpoint for 100
milliseconds, uninterrupted, to qualify as a valid trip condition.
Likewise, the input must fall outside the deadband and remain
there for 100 milliseconds to return the alarm to an untripped
condition. This results in a “dynamic deadband” —based on
time— in addition to the normal deadband.
Configuration
Unless otherwise specified, the factory presets the Model Q108 as
follows:
Diagnostic LEDS
The he Q108 is equipped with three front panel LEDs. The green
LED is a dual function LED labeled IN, which indicates line power
and input signal status. Active DC power is indicated by the
illuminated LED. If this LED is off, check DC power and wiring
connections. If the input signal is 10% above or below the
configured input range the green LED will flash at 8Hz or 4Hz,
respectively.
The two red LEDs indicate the relay state of each setpoint. An
illuminated red LED indicates the tripped condition for the
respective setpoint.
Output
The Q108 is equipped with two SPDT (form C) relays, rated at
120VAC or 28VDC at 5 amperes. Each of these relays is independently controlled by the field configurable setpoint and deadband.
Input: Current
Range:
Output: Dual, SPDT
Trip: A: HI; B: LO
Failsafe: No
Deadband: A, B: 0.25%
The DC power input accepts any DC source between 9 and 30VDC.
Note: An I/QRail is an optional accessory to power the modules. A
2, 4, or 8 position rail is available. See ordering information.
For other I/O ranges, refer to Table 1 and Figure 5. Reconfigure
switch SW1 for the desired input type, range and function.
0-20mA
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Figure 1: Limit alarm operation and effect of deadband.
WARNING: Do not change switch settings with power applied.
Severe damage will result!
CAL button. For low setpoints, increase the input level (green LED
turns off) to the desired deadband level and push the CAL button.
The green LED will be on and the red Relay "B" LED will be flashing.
5. Setpoint "B": Input the desired trip level for Relay "B" and push
the CAL button. The green and the red Relay "B" LED will be
flashing. Note that the green LED will stop flashing when the input
drops below a high setpoint or rises above a low setpoint.
6. Deadband "B": For minimum deadband (approximately 0.25%),
press and hold the CAL button for 4 seconds. For high setpoints,
lower the input level (green LED turns off) to the desired
deadband point and push the CAL button. For low setpoints,
increase the input level to the desired deadband level and push
the CAL button. The green LED will be on and both the red LEDs
will be flashing.
1. With the module removed from the rail and not powered, snap
off the face plate by lifting the right edge away from the heat sink.
Note the input switch (SW1) is located under the faceplate. Set
positions 9 & 10 for voltage or current input (see Table 1).
2. Set positions 1 through 4 of “SW1” for the desired input range
(see Table 1).
3. Set position 5 of “SW1” to ON (closed) for unipolar (e.g., zero
based, 0-20mA) range or OFF (open) for bipolar (e.g., -100% offset,
-20 to 20mA) range (see Figure 5).
4. Set positions 6 and 7 “SW1” to ON for a HI trip setpoint or OFF
for a LO trip setpoint (see Figure 5).
5. Set position 8 of “SW1” to ON for non-failsafe operation or OFF
for failsafe operation (e.g., alarm trips upon power failure).
Calibration
1. After configuring the DIP switches, connect the input to a
calibrated DC source and apply power. Refer to the terminal wiring
in the specifications section.
Note: For best results, calibration should be performed in the
operating environment, mounted on a DIN rail, allowing at least
one hour for thermal equilibrium of the system.
2. After applying power to the unit all three LEDs will flash for
approximately 10 seconds. Adjust the input signal level for the
Relay "A" setpoint. The green LED should be on. Press and hold the
CAL button for 4 seconds (until the red LED starts flashing) to enter
the calibration mode. The green LED will be on and the red Relay
"A" LED will be flashing.
Note: If the green LED is flashing, the input is out of range (i.e. 7
% above or below the configured range). Check to make sure the
input signal is within the DIP switch configuration range. Double
check the DIP switch settings.
3. Setpoint "A": Input the desired trip level for Relay "A" and push
the CAL button. The green LED and the red Relay "A" LED will be
flashing. Note that the green LED will stop flashing when the input
drops below a high setpoint or rises above a low setpoint.
4. Deadband "A": For minimum deadband (approximately 0.25%),
press and hold the CAL button for 4 seconds. For high setpoints,
lower the input level to the desired deadband point and push the
7. Press the CAL button once again to exit the calibration mode.
Check the setpoint and deadband to validate calibration.
Relay Protection and EMI Suppression
When switching inductive loads, maximum relay life and transient
EMI suppression is achieved by using external protection (see
Figures 2 and 3). Place all protection devices directly across the load
and minimize lead lengths. For AC inductive loads, place a properly
rated MOV across the load in parallel with a series RC snubber. Use
a 0.01 to 0.1mF pulse film capacitor (foil polypropylene recommended) of sufficient voltage, and a 47 ohm, 1/2W carbon resistor.
For DC inductive loads, place a diode across the load (PRV > DC
supply, 1N4006 recommended) with (+) to cathode and (-) to anode
(the RC snubber is an optional enhancement).
Table 1: Q108 Input Range Switch
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1WSrotceleS1WSrotceleS
1WSrotceleS
:yeK desolCroNO=1=
egatloVtnerruC
Vm01Am1
Vm02Am2
Vm05Am5
Vm001Am01
Vm002Am02
Vm005Am05
V1Am001
V2
V5
V01
V02
V05
V001
V002
12 34
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Figure 2: DC Inductive Loads
Figure 5: Q108 Input Range/Function Selection (SW1) Factory Default Settings
Note: For voltage inputs Current Enable must be off. For current inputs Voltage Enable must be off.
Figure 3: AC Inductive Loads
Figure 4: Typical Connections for Voltage or Current for Q108
Green LED
Red LED
Input Trip A
Signal Level
Input Trip B
Signal Level
Off
On
Flashing
Figure 6: Q108 Calibration Flow Chart
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Specifications
r
Inputs:
Voltage Input:
Range: 10mV to
+200V; Impedance: >100k ohms
Overvoltage: 200V rms, max.
Current Input:
Range: 1mA to
+100mA; Impedance: 20 ohms, typical
Overcurrent: 170mA rms, max.
Overvoltage: 60VDC (protected by self resetting fuse)
Common Mode (Input to Ground): 1800VDC, max.
LED Indicators:
Input Range (Green)
>110% input: 8Hz flash
<10% input: 4Hz flash
Setpoint (Red)
Tripped: Solid red
Safe: Off
Limit Differential (Deadband):
>50mV/5mA: 0.25% to 100% of span
<50mV/5mA: 1% to 100% of span
Response Time:
Dynamic Deadband:
Relay status will change when proper setpoint/process condition
exists for 100msec.
Normal Mode (analog filtering): <250mSec (10-90%)
Setpoints:
Effectivity: Setpoints are adjustable over 100% of selected input span.
Repeatability (constant temp.):
>50mV/5mA: 0.1% of full scale
<50mV/5mA: 0.2% of full scale
Temperature Stability:
+0.05% of full scale/°C, max.
Excitation Voltage: 24VDC, 20mA, maximum
Common Mode Rejection: DC to 60Hz: 120dB
Isolation: 1800VDC between contacts, input and power
ESD & Transient Susceptibility: Meets IEC 801-2, Level 3 (8KV)
Humidity (Non-Condensing):
Operating: 15 to 95% @45°C
Soak: 90% for 24 hours @65°C
Temperature Range:
Operating: 0 to 55°C (32 to 131°F)
Storage: -25 to 70°C (-13 to 158°F)
Power: 2.5W max., 9 to 30VDC
Relay Contacts
2 SPDT (2 form C) Relays; 1 Relay per setpoint
Current Rating (resistive)
120VAC: 5A; 240VAC: 2A; 28VDC: 5A
Material: Gold flash over silver alloy
Electrical Life:10
5
operations at rated load
Note: External relay contact protection is required for use with
inductive loads.
7
Mechanical Life: 10
operations
Wire Terminations: Screw terminations for 12-22 AWG
Weight: 0.56lbs.
Agency Approvals
UL recognized per standard UL508 (File No. E99775).
CSA certified per C22.2 No. 0-M91 & 142-M1987 (File No. LR42272-84).
Terminal
Connection Terminal
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2A nommoC,AyaleR 4C )CDV42+(ylppuSegatloV
3A .C.N,AyaleR 5C )-(tupnI
4A detcennoCtoN 6C )+(tupnI
5A )+(rewoPCD 1P desUtoN
6A )-(rewoPCD 2P desUtoN
1C .O.N,ByaleR 3P )+(rewoPCD
2C nommoC,ByaleR 4P )-(rewoPCD
Connection
Ordering Information
Models & Accessories
Specify (model number)
1) Q108-0000
2) Specify I/QRail type and quantity (optional)
3) Accessories: (see Accessories)
4) Optional Custom Factory Calibration: Specify C620 with desired
input, setpoint and deadband.
Accessories
ActionI/Q series modules mount on standard TS32 (model MD02) or TS35
(model MD03) DIN rail. In addition, the following accessories are available:
MD02 TS32 DIN rail
MD03 TS35 x 7.5 DIN rail
WV905 24VDC Power Supply (500mA)
H910 24VDC Power Supply (1 Amp)
H915 24VDC Power Supply (2.3 Amp)
IQRL-2002 2 Position I/QRail &DIN rail
IQRL-2004 4 Position I/QRail &DIN rail
IQRL-2008 8 Position I/QRail &DIN rail
Printed on recycled pape
Dimensions
Action Instruments
Chessell
Eurotherm
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